Homogenization valve

Abstract

An homogenization valve design yields improved homogenization efficiency. The length of the valve surface relative to the valve seat or land is controlled so that the overlap is limited. This allows convergence between turbulent mixing layers and a homogenization zone. Preferably some overlap is provided, however, to contribute to the stability of the valves and avoid destructive chattering.

What is claimed is: 
     
       1. A homogenizer valve comprising: a stack of annularly-shaped valve members defining a central hole and axial fluid conduits with homogenization occurring as the fluid passes between the central hole and the axial fluid conduits through intervening annular valve gaps defined by opposed valve surfaces and valve seats, the gaps being less than 0.003 inches, in which the downstream terminations of the valve surfaces have an overlap that is less than 0.025 inches; and   annular springs that align adjoining pairs of the valve members, the springs fitting in spring-grooves formed in the valve members.   
     
     
       2. The homogenizer valve described in claim 1, wherein downstream terminations of the valve surfaces overlap the valve seats by at least a height of the valve gaps. 
     
     
       3. The homogenizer valve described in claim 1, wherein the valve seat is chamfered in the downstream direction. 
     
     
       4. The homogenizer valve described in claim 3, wherein an angle of the chamfer is at least 10 degrees. 
     
     
       5. The homogenizer valve described in claim 3, wherein an angle of the chamfer is up to 90 degrees. 
     
     
       6. The homogenizer valve described in claim 1, wherein the valve seats are knife edge lands. 
     
     
       7. The homogenizer valve described in claim 6, wherein the valve seats are less than 0.06 inches in length.